| Acronym | Definition |
|---|
| ATI➣Array Technology Inc. (manufacturer of hardware/software products) |
| ATI➣Advanced Technology Institute |
| ATI➣Advanced Training Institute (International homeschool group) |
| ATI➣Air Techniques, Inc. (air emission control industry; Marietta, GA) |
| ATI➣Acronis True Image (disk imaging software) |
| ATI➣Allegheny Technologies Incorproated (various locations) |
| ATI➣Access to Information |
| ATI➣Agricultural Training Institute (Philippines) |
| ATI➣American Technologies, Inc. (California) |
| ATI➣Agricultural Technical Institute (Ohio State University) |
| ATI➣Auto-Tech Interiors |
| ATI➣Advanced Training Institute (India) |
| ATI➣Access Terminal Identifier |
| ATI➣Active Transfer Initiate |
| ATI➣Array Technology Industry |
| ATI➣Allied Telesyn International |
| ATI➣Allegiance Telecom, Inc. (Dallas, TX) |
| ATI➣Assistance Technique d'Ingénieur (French: Technical Support Engineer) |
| ATI➣Alternatives to Incarceration |
| ATI➣Alexander Technique International (various locations) |
| ATI➣Aviation Training Institute |
| ATI➣Applied Technology Institute |
| ATI➣Apparent Thermal Inertia (remote sensing) |
| ATI➣Accessible Technologies Inc. (supercharger manufacturer) |
| ATI➣All Taxes Included (sales) |
| ATI➣Air Transport Industry |
| ATI➣Anti-Trust Immunity (air travel) |
| ATI➣American TeleCare, Inc. (Eden Prairie, MN) |
| ATI➣Appropriate Technology International (Washington, DC) |
| ATI➣Aptitude-Treatment Interaction (behavioral science) |
| ATI➣Amplifier Technologies Inc. |
| ATI➣Above the Influence (government anti-drug campaign) |
| ATI➣Anti-Tobacco Industry |
| ATI➣Above-Threshold Ionization |
| ATI➣Amylase-Trypsin Inhibitor |
| ATI➣Art and Theatre Institute (Czech Republic) |
| ATI➣Adjusted Taxable Income |
| ATI➣Along-Track Interferometry |
| ATI➣Amblyopia Treatment Index (parental questionnaire; optometry) |
| ATI➣Accelerated Technology, Inc |
| ATI➣Artist Teacher Institute (New Jersey) |
| ATI➣American Trades Institute |
| ATI➣Advanced Technologies Incorporated |
| ATI➣Any Time Interrogation |
| ATI➣Average Total Inspection |
| ATI➣American Tasting Institute |
| ATI➣Advanced Telecommunications Institute |
| ATI➣Alternativa de Transporte Integrado (Integrated Alternative Transportation, San Juan) |
| ATI➣Automatic Transaction Initiation |
| ATI➣Audio-Tactile Interface (US Election Assistance Commission) |
| ATI➣Associate Member of the Tax Institute (Australia) |
| ATI➣Aventura Trust Investments (Florida) |
| ATI➣Automatic Test Inhibit |
| ATI➣Associate of the Textile Institute |
| ATI➣Artillery Target Intelligence |
| ATI➣Automated Technical Information |
| ATI➣Air Transport Indicator |
| ATI➣American Transtech Inc. (carrier for AT&T T1 circuits) |
| ATI➣Associated Technologies, Inc. |
| ATI➣Anaesthetists in Training in Ireland |
| ATI➣Any Three Initials (band) |
| ATI➣Associacion de Tecnicos de Informatica (Spain) |
| ATI➣American Training International (California) |
| ATI➣Activist's Times Incorporated |
| ATI➣Air Technical Index |
| ATI➣Automatic Track Initiation |
| ATI➣Albuquerque Technology Incubator |
| ATI➣Air Toxics Index |
| ATI➣Automation of Technical Information |
| ATI➣Aquamira Technologies, Inc. |
| ATI➣Approved Training Institution |
| ATI➣Anjuman Talaba Islam (aka Anjuman Talaba-e-Islam; Sunni group; Pakistan) |
| ATI➣Andromeda Training, Inc. |
| ATI➣Automated Tactical Intelligence |
| ATI➣AudioTechnologies Inc |
| ATI➣Airborne Tracker-Illuminator |
| ATI➣American Trainco, Inc (Centennial, CO) |
| ATI➣AWSIM to TBMCS Interface |
| ATI➣Aware Technology International (UK) |
| ATI➣Application Template Interface |
| ATI➣Arithmétique et Théorie de l'Information (French: Arithmetic and Information Theory) |
| ATI➣Alternative Technologies International (Muncy, PA) |
| ATI➣Atmospheric Technologies Inc. (Calgary, AB, Canada) |
| ATI➣Achievement Through Innovation (ATI Systems) |
| ATI➣Arizona Toxics Information Inc. (Bisbee, AZ) |
| ATI➣Agence du Traitement de l'Information |
| ATI➣Available Taxable Income (student financial aid) |
| ATI➣Automotive Training Institutes |
| ATI➣Accurate Technologies Incorporated (Wixom, MI) |
| ATI➣Ambient Temperature Illuminator (military device; US DoD) |